Skip to main content.

Archives, History & Records Office

SLACspeak Legacy (NON-CURRENT terms)

Glossary of *NON-CURRENT* SLAC-related abbreviations, acronyms, initialisms, terms and lingo useful for research into SLAC history

About SLACspeak     Search CURRENT terms

To search legacy glossary terms:

  • Press Control + F (on Windows or Linux) or Command + F (on a Mac) OR
  • From web browser menu, select Edit > Find

Browse legacy glossary terms alphabetically below

0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

0-9

2NS
VENUS detector at KEK-TRISTAN.
5045s
Klystrons used to power the SLAC linac, so called because they produce 50MW peak power and 45MW average power.
8-Pack Project
NLC R&D project to construct an operating special power source using a solid state induction modulator power two 75 MW X-band klystrons, with a SLEDII pulse compression system.

Back to top

A

AA
Antiproton Accumulator. (CERN)
AAO
Affirmative Action Office.
AAP
American Association of Publishers. Often used in the context of SGML as the AAP DTD
AAR
Association of American Railroads.
AATF
Affirmative Action Task Force
AATF
Advanced Accelerator Task Force HIST
ABRT
ABoRT.
ABS
Atomic Beam Source.
AC
Antiproton Collector (CERN)
Accelerator Department Safety Office
See ADSO.
Accelerator Improvements
See AI.
Accelerator Maintenance East
See AME.
Accelerator Maintenance RF Systems
See AMRF.
Accelerator Maintenance Special Systems
See AMSS.
Accelerator Maintenance West
See AMW.
Accelerator Physics Expert
See APE.
ACCM
ACCMOR Collaboration.
ACCS
ACCelerator Status. A database primary.
ACD
Advanced Computations Department. (SLAC)
ACDA
American Commodity Distribution Association
Achromat
The concrete girders, or cells, in the SLC arcs are called 'achromats' because their magnetic optics are designed to be achromatic. A beam line is called achromatic when its beam transport characteristics do not change momentum. For convenience of construction and operation, the arcs are divided into 23 subsections, each made up of 20 magnets. Each subsection is called an achromat.
ACI
American Competitiveness Initiative.
ACL
Access Control List
ACME
Advanced Cosmic Microwave Explorer
ACT
Atmospheric Cerenkov Telescope.
AD
Accelerator Department.
AD
Antiproton Decelerator (CERN)
AD&I
Accelerator Design & Integration. (ILC)
AD2
Antiproton Decelerator (CERN)
ADA
Anello Di Accumulazione. Italian half-meter diameter positron- electron asymmetric ring. Built in 1961.
ADC
Analog to Digital Converter.
ADCC
See ADCOC. COMPUTING
ADCOC
Associate Directors' Committee on Computing.
ADCP
Pointer to ADC location in buffer. (%ADC n + CH m) where n is the ADC number o ...M is the channel number. A magnet VAX database secondary.
ADONE
Italian 1.5 GeV electron-positron collider. In operation 1969-1993 (Frascati)
ADP
Automated Data Processing
ADS
Anti-De Sitter
AE
Architect / Engineer.
AEC
Atomic Energy Commission. Superseded by the Energy Research and Development Agency (ERDA), which in turn was superseded by the Department of Energy (DOE). Established 1 August 1948, superseded 11 October 1974. GOV
AECM
Architectural Engineering Construction Management.
AEMCBP
Advances in Experimental Methods for Colliding Beam Physics.
AEMS
Argonne Effective Mass Spectrometer.
AES
Advanced Engineering Staff (General Motors).
AES
Advanced Energy Systems.
AFRD
Accelerator and Fusion Research Division (Lawrence Berkeley National Laboratory)
AGF
Alternating Gradient Focusing magnet. The SLAC arcs are made up of AGF magnets. See also Achromat.
AGOR
l'Accelerateur Groningen-ORsay. a cyclotron resulting from collaboration between KVI and IPN.
AGS
Alternating Gradient Synchrotron (Brookhaven)
AIP
Accelerator Improvement Project.
AIPE
American Institute of Plant Engineers.
ALCOR
Algebraic Coalescence Rehadronization
ALE
Asymptotically Locally Euclidean
ALEP
ALEPH - CERN LEP detector.
ALEPH
CERN-LEP detector
ALICE
large ion collider detector experiment at the CERN LHC.
ALICE
Alpha LInux Cluster Engine.
AMBASS
AMBASSador. A model of computer terminal manufactured by Ann Arbor Corporation.
Ambassador
See AMBASS.
AME
Accelerator Maintenance East. Part of PCD.
AMEP
Assistant Manager for Energy Programs.
AMJ
AMplitude Jitter. A klystron summary display message indicating jitter in the klystron output.
AMM
AMplitude Mean. A klystron Summary Display message indicating that the klystron mean amplitude is out of tolerance.
AMplitude Jitter
See AMJ.
Amplitude Mean
See AMM.
AMR
Adaptive Mesh Refinement
AMRF
Accelerator Maintenance RF Systems. This is the department responsible for the maintenance of Linac klystrons, DR klystrons, klystron vacuum pumps power supplies, pulsed RF systems, phase and RF cooling water systems (formerly called `Gallery Maintenance').
AMSS
Accelerator Maintenance Special Systems. The group responsible for the maintenance of the kickers. There are approximately a dozen kicker systems on the SLC experiment. See also Kicker.
AMW
Accelerator Maintenance West. Part of PCD.
AMY
AMY detector at KEK-TRISTAN.
Analog Status
See ASTS.
ANRCP
Amarillo National Resource Center for Plutonium
Anti-Preprints
A section in PPF (Preprints in Particles and Fields) published by the SLAC Library, which lists publication information for former 'preprints.' Available from SLAC's ftp server at: ftp://preprint. slac.stanford.edu/preprints/Miscellaneous/
AOG
Accelerator Operations Group.
AORR
Accelerator Operations Readiness Report.
AOT
ADC Out of Tolerance. A MCC klystron CUD message.
AP
Algorithm processor.
APARS
Advisory Panel on Accelerator Radiation Safety.
APD
Avalance PhotoDiodes
APE
Accelerator Physics Expert. A person recording incidents and problems during operations of the SLC in order to collect data for analysis and improving operation efficiency. Also called 'Machine Physicist.'
APEX
Accelerator Physics EXperiment.
APIARY
An early ACROnymn for the B Factory. Alper Garren, an LBL accelerator physicist who first designed the lattice for what is now referred to as PEP-II, or the B Factory, coined the phrase 'Asymmetric Particle Interactions Accelerator Research Yard.' Pier Oddone at LBL used an alternate version that captured the physicist's perspective of the high luminosity: 'Asymmetric Particle Interactions At Roaring Yield.'
APM
Automated Photographic Measuring
APM
Automated Plate Measurement
Apron
The floor area in the CEH. Some Power Supplies and SLC controls hardware are located on the apron. In any sunken experimental collision area, the apron is the edge at ground level, and the sunken area is called the `pit.' SLAC
APUL
Accelerator Project to Upgrade LHC.
Arc
One of the two curved, caliper-shaped transport lines of the SLC which transport the two beams from the switchyard to the final focus area for collision. Since the arcs are curved and without klystron accelerator stations, about two GeV of beam energy is lost in each arc. See also Achromat.
ARCM
Arc Magnet
ARCS
Accelerator Resonantly Coupled Energy Storage
ARG
ARGUS detector at DORIS.
ARGUS
A complete particle detector, upgraded with a microvertex drift chamber for B-meson physics, at DESY DORIS-II.
AROD
Accelerator Research and Operations Division.
ARRA
American Recovery and Reinvestment Act (2009).
ART
Americas Regional Team (ILC).
ASLUND
BaBar fast Monte Carlo simulation
ASP
Anomalous Single Photon detector and experiment at PEP.
ASPK
Automatic SParK chambers.
ASSET
Accelerator Structure SET-up. A SLAC experiment to test future linear colliders. A three-meter beam line space in linac sector two has been reserved to test X-band structure.
ASTE
ASTErix detector at LEAR. (CERN)
Astro2010
National Academy of Sciences' National Research council report New words, new Horizons in Astronomy and Astrophysics, released 8/13/ 2010.
ASTS
Analog STatuS. An SLC VAX primary.
ATB
Augmented Technical Board.(BaBar)
ATIC
Advanced Thin Ionization Calorimeter
ATOL
ADC TOLerance. A VAX magnet database secondary. The loose tolerance on desired current. Used for calibration, standardization, and for diagnostic knobs.
Atomic Energy Commission
See AEC.
ATW
Accelerator-Driven Transmutation of nuclear Waste. A proposed Japanese Atomic Energy Research Institute (JAERI) facility that, if constructed, would bombard long-lived radioactive isotopes with neutrons to convert them into more stable isotopes.
ATWD
Analog Transient Waveform Digitizers (NESTOR).
AWG
Analysis Working Group (BaBar).
AXAF
Advanced X-Ray Astrophysics Facility.

Back to top

B

B Factory
"One of two high-energy physics facilities currently in operation in the US (SLAC) and Japan (KEK). Both B Factories collide electrons with positrons to produce large numbers of B mesons (bound states of a bottom quark and an anti-down quark) and anti-B mesons. By measuring the difference in decays of B and anti-B mesons, physicists hope to understand CP violation, thought to bathe reason why matter dominates in the universe. At SLAC, the B Factory accelerated electrons at 9 GeV and positrons at 3.1 GeV at KEK, the energies are 8 GeV and 3.5 GeV.
B845
BNL experiment 845 detector.
BaBar
Official name for SLAC B Factory detector. Also known as B B-bar detector. (Named after the elephant in Laurent DeBrunhoff's children's books, with permission of DeBrunhoff's estate.)
Backplane
Signal data bus at the rear of a CAMAC crate or multibus crate.
BACOP
Bay Area Construction Opportunity Program.
BAD
BaBar Analysis Document.
BAIS
BaBar Analysis Information System
BAKS
Baksan underground scintillation telescope.
BATS
Ballistic Aerial Target System.
BATSE
Burst and Transient Source Experiment
BAW
Baseline Assessment Workshop. (ILC)
BBS
Bulletin Board System. An electronic message center serving a specific interest group.
BC
Bubble chamber.
BCAL
Barrel CALorimeter
BCAT
A database primary.
BCD
Bottom Collider Detector (FermiLab)
BCD
Baseline Configuration Document (ILC).
BCSG
Big Collider Study Group
BD-100
The Neutron Bubble Detector-100 at Chalk River Nuclear Laboratory.
BDIR
Beam Delivery and Interaction Region (ILC).
Beam Code
A code of two bytes of timing information broadcasted from the MPG to all micros and crates. Each beam is operated under its own code which establishes its timing pattern. See PPYY and PP Beam #.
BEBC
Big European bubble chamber at CERN.
BELLE
KEKB detector (Japan)
BEMC
Backward ElectroMagnetic Calorimeter
BESS
Balloon-borne Experiment with Superconducting Spectrometer (US- Japan)
BFAC
B-FACtory.
B-Factory
See B Factory.
BFMail
An electronic mail system that allows PEP-II and Detector collaborators to send e-mail using the PEP-II Database from any computer platform. See also PEP-II Database.
BGO
Bismuth Germanate. (SLAC E-146 used a BGO spectrometer)
BGRP
Beam Group.
BIDB
Beam Intensity Display. A database primary.
BIDU
Beam Intensity Display Unit. A database primary.
Big Sky
A laser spot monitor for the SLC Laser gun. This is the name of a commercially available software and hardware package.
BIS
Business Information Systems (SLAC).
BIS2
BIS-2 spectrometer at Serpukhov.
BITNET
Because It's Time NETwork. A U.S. academic-based network that relied on the Internet network to transfer messages and files. Originally it was a separate international network that supported international communication via cooperating networks on most continents and gateways to unrelated networks.
BITT
Business Improvement and Transition Team.
BKDE
Brookhaven Kaon Decay Experiment.
Blow Torch Quads
A concentration of quadrupole magnets in the front end of the LINAC just after the positron injection point. The quads transport the large emittance positron beam through Sector 1.
BNHBC
British National Hydrogen Bubble Chamber.
BNL ION
Brookhaven heavy ion accelerator.
BNL Proposals
Experimental proposals put out by the Brookhaven Laboratory.
BOA
Basic Ordering Agreement.
BONA
Bonanza nonmagnetic detector at DORIS.
BPMP
Beam Position Monitor Processor. A CAMAC module that is used to process and digitize the four signals from BPMS.
BSD
Business Services Division.
BSIT
Business Services and Information Technology. (SLAC)
BSLS
Business Systems and Lab Support (BSD-SLAC)
BSM
BeamStrahlung Monitor. A device for detecting beamstrahlung radiation in the SLC final focus. See also Beamstrahlung.
BSMD
BeamStrahlung Monitor Data. A database primary.
BSO
Berkeley Site Office (DOE)
BTS
Business & Technology Services (SLAC)
BU
BUdget Office.
Bucking Coil
A solenoid used to cancel a detector field outside of the detection area (usually also a solenoid). Solenoid coils are used to cancel stray solenoid fields at the SLC or NPI guns, so that the beam is not adversely affected by the stray fields.
BUG
Basic User's Guide. An SLC Control system document.
Bugger List
The list of bypassed MPS devices such as ionization chambers, slits, or water temperature interlocks. The list is in a blue binder on the console desk.

Back to top

C

C Line
The beam line extending from the BSY to End Station C. The C line was replaced by the Final Focus Test Beam.
C2CR
Colliders to Cosmic Rays, a conference meeting in Prague in Sept 2005.
CA
Collider Arc (North or South).
CALF
Cursor Addressed Limited Facility. A console using only a single Ann Arbor Ambassador terminal.
Calibration
For the BaBar detector: the characterization of the response of the detector and/or detector electronics to known stimuli. The purpose of calibration is to record those responses, in order to provide a better understanding of the physics significance of the event data, and to allow optimization of the detector for taking subsequent event data.
CALICE
CAlorimeter for the LInear Collider with Electrons.
CALICO
Correction Algorithms for Linear COlliders
CALIOPE
Chemical Analysis by Laser Interrogation of Proliferation Effluents
CALS
Computer-Aided Acquisition and Logistics Support.
CAM CAMAC
A klystron SDS message indicating that the CAMAC system is malfunctioning at a given station.
CAMAC
Computer Automated Measurement And Control. A system interface between computers and the devices they control. It is a backplane type crate system incorporating a 5Mb/sec serial link. The SLC CAMAC system includes more than 300 crates.
CAMAC Communication
See CAMCOM.
CAMAC DAC Location
See DACL.
CAMAC Serial Repeater
See CSR.
CAMCOM
CAMAC Communication. An interactive program used primarily for diagnostics during early commissioning of new hardware on the
CAMAC system
It allowed users to communicate with CAMAC modules directly from a terminal.
CAMR
CAMeRa.
CAPRI
California Asymmetric Phi factoRI.
CAR
Cable Access Receiver. A triple width CAMAC module with an RF receiver (modem). The CAR converts a serial bit stream to parallel data words.
CARD
Computing and Administrative Resources Division.
CAS-0
CID Analyzing Station. A horizontal bend energy spectrometer.
CAT
Compteur A Trous. (Detector-CERN)
CAT
Cable Access Transmitter. A CAMAC module which broadcasts information to other micros on SLCNET channels, or over a baseband link.
CATER
Computer Aided Trouble Entry and Report. A VAX database program used to manage maintenance issues in which problems and solutions are reported and communicated to the proper department. `To cater' means to report a problem in this. (Formerly called ARTEMIS.)
CATS
Corrective Action Tracking System. (Superseded by ATS)
CATV
Community Antenna Television. A closed broadband coaxial cable network used for information distribution in campuses, buildings and cities. It is in use at SLAC in the Learning Room in the Library. See also SITN
CB
Crystal Ball (see entry under same)
CBAL
Crystal Ball detector. (See entry under Crystal Ball.)
CBAR
Crystal BARrel detector at CERN-LEAR.
CBE
Cylindrical Beam Expander.
CBOX
Crystal Box at LAMPF.
CBX
Colliding Beam eXperiments
CC
Command Center.
CC
Cloud chamber.
CC
Coordinating Council (ES & H)
CCC
Computer Coordinating Committee SLAC
CCG
Central Computing advisory Group. Also, Computing Coordination Group.
CCNET
A DECNET-based network that includes Carnegie-Mellon, Case Western Reserve, Columbia University, New York University Business School, Stevens Institute of Technology, and Vassar College. Although now part of the Internet, CCNET sites originally communicated with BITNET and MAILNET through gateways.
CCR
Central Control Room. The original control center for the accelerator. Not in use anymore but still wired to some control systems. Located North of the LINAC gallery near Sector 27.
CCS Bump
A betatron phase bump produced with magnets A15, A14, A7, and A6 across the CCS in the SFF or NFF. It produces a small amount of dispersion at the IP to cancel the residual dispersion at the final focus interaction point.
CDHS
Neutrino detector at CERN.
CEA
Cambridge Electron Accelerator, a joint Harvard-Massachusetts Institute of Technology Facility. Laboratory was closed in 1974. PHYSICS HIST-->
CEA Bypass
Modification to the CEA synchrotron to turn it into a collider.
CEH
Collider Experimental Hall. The pit at the east end of the SLC, housing both the MARK II and the SLD detectors and their associated electronics.
CELL
CELLO detector at DESY. HEP
Central Control Room
See CCR.
CERN ISR
CERN proton-proton Intersecting Storage Rings (62 GeV Ecm).
CERN LEP
CERN Large Electron-Positron collider (161 GeV, as of 1996)
CERN PS
CERN's Proton Synchrotron, a 630-meter-circumference machine that began operation in 1959.
CERN SC
CERN cyclotron (600 MeV/c Plab)
CESR
Cornell Electron-positron Storage Collider (10 GeV).
CG
Computation research Group.
CGWG
Cyber Governance Working Group.
CH
Collider Hall (See also CEH).
CHEER
Canadian High Energy Electron Ring.
Chen Institute
Institute for the study of particle astrophysics and cosmology. Established in 2001 at Stanford University and located at SLAC.
CHF
Central Helium Facility.
CHM2
CHARM-II neutrino detector (glass) at CERN.
CHRM
CHARM neutrino detector (marble) at CERN.
Chromatic Correction Section
See CCS.
CIBS
CERN-IHEP boson spectrometer.
CID
Collider Injector Development. The first accelerator section of the SLC (also called the injector). Also: The general area near the injection guns, or the PPS area going from the guns to K01 accelerator section.
CIFS
Committee on the International Freedom of Scientists.
CISA
Committee on International Scientific Affairs (APS).
CLE
Central Lab Expansion. (Building 084)
CLEO
Cornell magnetic detector at CESR.
CLIC
CERN LInear Collider. CERN design for a two stage RF linear collider, described in a series of several hundred 'CLIC-Notes'. Also 'Compact Linear Collider' (see CLIC Note 302).
CMMCOM
See CAMCOM.
Collider Experiment Hall
See CEH.
Computer Aided Trouble Entry and Report
See CATER.
Computer Automated Measurement and Control
See CAMAC.
Console Desk
The central desk in MCC where call-in books, log books and other references are located.
Console on Wheels
See COW.
Continuously Updating Display
See CUD.
COSEPUP
Committee On Science, Engineering, and Public Policy (NAS)
COSWA
Committee on Science and World Affairs.
COW
Console On Wheels. An operator station including an Ann Arbor terminal, a multibus crate with a micro, two displays or CRTs and four to eight control knobs.
CPAPD
Chinese People's Association for Peace and Disarmament
CPDF
Central Personnel Data File.
Crate
A CAMAC card slot chassis and power supply incorporating a backplane which supports CAMAC modules. Crates are connected to each other and to the micro by a 5 Mbit serial link. The crate modules are the last link in the chain which interfaces the computer to the hardware in the SLC control system.
Crate Verifier
A CAMAC module whose purpose is to test and verify the operational condition of its crate. Verifier modules are usually installed in slot 1 of the crate.
CRBE
First interactive system on the SLAC 360/91 (1968). Replaced with WYLBUR in 1970.
CRESST
Cryogenic Rare Event Search with Superconducting Thermometers.
CRID
Cherenkov Ring Imaging Detector. An SLD detection system which identifies particles by measuring their velocities.
Crystal Ball
Crystal Ball detector. Built by a SLAC/Stanford, CalTech, Harvard, Princeton collaboration. Used on SPEAR (at SLAC) from 1978 to 1981
CSD
Computer Science Division (SLAC)
CSE
Cross System Extension.
CSR
CAMAC Serial Repeater. Used where CAMAC crates are separated by long distances as in the arcs. It is an in-line amplifier for CAMAC signals.
CTIM
A database secondary indicating the last time a magnet was successfully calibrated.
CUB
Central Utility Building.
CUD
Continuously Updating Display. A video display unit in MCC indicating faulted devices in the machine. The better term for CUD is `Status Summary Display (SDS).' There are several of these units in MCC.
Cursor Addressed Limited Facility
See CALF.
CWR
Collaboration-Wide Review (BaBar).

Back to top

D

DAC
Director's Advisory Committee.
DAC
versus Current Goodness See DVIG.
DACL
CAMAC DAC location. A magnet database secondary.
DACV
A magnet database secondary indicating the last DAC value.
Daczero
To run down a magnet to zero current. This is done by putting zero volts on the DAC that controls the magnet's power supply.
DAFNE
phi-meson factory at the Frascati National Laboratories (Italy)
DALEC
Dump All Low Extracted Currents. A system which senses current in the Damping Ring before extraction and stops extracted beam in the Beam Switch Yard if current is below a specified threshold.
Damping Ring Injection Point
See DRIP.
Damping Ring Phase Processor
See DROPP.
Damping Ring RF
See DRRF.
Damping Ring Turns Counter
See DRTC.
DAPHNE
see DAFNE.
DAS
Data Acquisition System (SLD)
DASP
DESY double-arm spectrometer.
DAT
An abbreviation for DATA used in VAX file terminology as in `File.Dat.'
DBC
Deuterium bubble chamber.
DBEX
DataBase EXecutive. A VAX process which transfers data between the micros and the host computer.
DBGEN
DataBase GENeration. The process of rebuilding the database on the SLC VAX. It is a process that adds new signals to the database and simultaneously checks that no two signals have the same name.
DBInstall
Transfer of the complete database from the SLC VAX to the MCC VAX (or vice versa). It involves a brief shut down of operations. (The computer can't use the database while it is being updated.)
DCH
Drift CHamber. (BaBar)
DCI
Dispositif de Collision dans l'Igloo. The electron - positron storage ring at ORSAY.
DCL
Digital Command Language. The command language used by the VAX.
DCVD
Drift Chamber Vertex Detector. It is used for high-precision tracking of charged particles near the interaction point.
DDS
Damped Detuned Structure
DEAR
Experiment conducted at the Frascati National Laboratories (Italy) phi-meson factory DAFNE
Decnet
A VAX communications system protocol between DEC computers. Decnet provides remote file service and remote terminal sessions. It can be used on the Ethernet cable system.
DELCO
Direct ELectron COunter, an experiment at PEP.
DELPHI
DEtector with Lepton Photon and Hadron Identification. (CERN-LEP)
DESY HERA
DESY Hadron Electron Ring Accelerator
DGRP
Display GRouP. A VAX primary.
DIDN
Digital Input Device label defiNitions. A VAX primary.
Differential Pumping Station
See DPS.
Digital Command Language
See DCL.
Digital InputDevice Label Definitions
See DIDN.
Digital to Analog Converter
See DAC.
DIRC
Detector of Internally Reflected Cherenkov light. DIRC is a device developed for use in the SLAC BaBar Detector. Also: Detection of Internally Reflected Cerenkov Light. Invented by Blair Ratcliff.
Disaster Monitor
Obsolete. See Burn Through Monitor.
Display Group
See DGRP.
Divide By Four
A module which divides by four the S-BAND frequency to get the RF subharmonic used in the damping rings.
DLCO
DELCO detector at SLAC-SPEAR or SLAC-PEP.
DLPH
DELPHI detector at LEP.
DM
Disaster Monitor. See Burn Through Monitor.
DM1
Magnetic detector no. 1 at Orsay DCI collider.
DM2
Magnetic detector no. 2 at Orsay DCI collider.
DOE ACTS
Department of Energy Academies Creating Teacher Scientists.
DOE ER
Department of Energy, Energy Research. This department supersedes the Energy Research and Development Agency (ERDA), which superseded the Atomic Energy Commission (AEC).
DOE OBER
Department of Energy Office of Biological and Environmental Research.
DOE SF
DOE San Francisco Field Office.
DOE/OAK
Department of Energy Oakland Operations Office
DOENTS
Department of Energy Nationwide Telecommunication Services.
DONUT
Direct Observation of the NU Tau. Experiment (FermiLab) that in 2000 directly observed the tau neutrino for the first time.
DORIS
DOppel RIng Speicher, a storage ring at DESY.
DPAC
Deputy Physics Analysis Coordinator (BaBar).
DPG
Deutsche Physikalische Gesellschaft GOV
DPS
Differential Pumping Station. A refrigerated section of waveguide which is used to maintain a difference in vacuum pressure between the LINAC and BSY, yet allows beam to pass (also called Refrigerated Baffle).
Drift Chamber Vertex Detector
See DCVD.
DRIP
Damping Ring Injection Point. 1. A PPS area between PPS Sector 0 and PPS Sector 2, and the Damping Ring vaults. 2. The point where the beamlines from and to the rings are connected (the Ten Finger Box).
DROPP
See DRPP
Dropp Phase
A Damping ring phase shifter used in phase ramping the damping ring RF to phase the beam with respect to the LINAC S-BAND frequency.
DRPP
Damping Ring Phase Processor. A CAMAC module driving the Damping Ring Phase Shifter. (Sometimes appears as DROPP.)
DRRF
Damping Ring RF. A VAX primary.
DRS
DResS.
DRTC
Damping Ring Turns Counter. A CAMAC module including a 20 bit counter reset by the FIDO missing pulse and incremented by the MTG: used to synchronize extraction from the damping rings with respect to PEP RF when filling the PEP storage ring.
DRV
Damping Ring Vault. (SLC)
DSP
Digital Signal Processors
DTE
Data Terminal Equipment.
DUD
Deep Underground Detector (IMB).
DUMAND
Deep Underwater Muon And Neutrino Detector.
DUSEL
Deep Underground Science and Engineering Laboratory (at Homestake Mine, South Dakota). Became SURF.
Dvi
A common abbreviation for DeVice Independent. It refers to output produced by TeX, and is often used as the "extension" portion of a computer file specification containing TeX output, as in "myletter.dvi."
DVI
The product of the DAC and power supply transfer functions. For conversion of DAC units to power supply output units. A SLC VAX database secondary.
DVIG
DAC Versus current Goodness. The root mean square residual error (in DAC bits) from the linear fit as determined from a calibration. A magnet database secondary. Also, a SLC VAX database secondary.
Dvips
A commonly-used program that converts TeX DVI files to PostScript. An important feature is that it can merge other PostScript files into its output, permitting an author to include figures and other graphics with text.

Back to top

E

EA
Experimental Group A.
EAG
Employee Activity Group.
EB
Experimental Group B.
EC
Experimental Group C.
Echo-7
Experiment conducted at NLCTA in 2009-2010.
ECI
Export Controlled Information
ECON
Beam energy (GeV) at magnet center from the stored computer configuration currently in use.
ED
Experimental Group D.
EDB
Energy DataBase.
EE
Experimental Group E.
EFCOG
Energy Facilities Contractors Group
EFD
Experimental Facilities Department, formerly part of SLAC's Research Division, now the Facilities Department in the Operations Directorate.
EG
Experimental Group G.
EGRET
Energetic Gamma Ray Experiment Telescope,
EH
Experimental Group H.
EI
Experimental Group I.
ELD
Electronics Department (disbanded).
EMPACT
Electrons Muons Partons with Air Core Toroids. A proposed experiment at the SSC designed with a high resolution detector capable of utilizing the ultimate luminosity of the SSC. EMPACT was merged with the Texas collaboration, which was later combined with the L-star and other experiments to form a second detector effort at the SSC. See also GEM.
EN 17
Engine 17 at the SLAC Fire Station.
Energy Research and Development Agency
See ERDA.
EP&WM
Environmental Protection and Waste Management. Defunct SLAC department since restructured into two departments: Environmental Protection, and Restoration and Waste Management. ENVIRO
EP01
Extraction Positron 1. A micro-computer controlling the devices in the extraction line area.
EP02
Extraction Positron 2. The micro-computer controlling devices in the positron vault area.
EPC
Experimental Program Control.
EPO
Education and Public Outreach (GLAST).
EPW
Eugene P. Wigner (1902-1995).1963 Nobel Laureate in Physics.
ERAB
Energy Research Advisory Board.
ERDA
Energy Research and Development Agency. Superseded the Atomic Energy Commission (AEC),and was itself superseded by the Department of Energy (DOE). Established 11 October 1974,superseded 4 August 1977.
ERL
Environmental Research Laboratories.
Errtalk
A VAX process broadcasting errors to terminals.
ES&HCC
Environment, Safety, and Health Coordinating Council.
ESA
Earth Sciences Associates.
ESAAB
Energy System Acquisition Advisory Board.
EVE
A text editing program for the VAX.

Back to top

F

F731
FNAL E-731 Spectrometer-Calorimeter.
FAMIS
Facilities Asset Management Information System. A Computer Maintenance Management System (CMMS) used by SLAC ETS.
FAS
Federation of American Scientists.
FBC
Freon bubble chamber.
FBLJA
Forward-Backward Lepton Jet Analyzer.
FCS
Future Computing at SLAC.
FCST
Federal Council for Science and Technology.
FCTS
Fast Control and Timing System (BaBar)
FD
Fire Department (under contract from the City of Palo Alto).
FEA
Finite Elements Analysis. (BaBar)
FEI
Firing Error Indicator.
FID
FIDucial. SLAC
FIDO
FIDucial Output. a chassis which is used as a local timing reference. The FIDO extracts the fiducial pulse from the 476 MHz MDL. The output of the FIDO is a 119 MHz signal with a missing half cycle to indicate T-zero which is fed to a PDU.
Fiducial
A pulse created every 2.8 milliseconds, doubled in amplitude, and used as a marker for timing. This double amplitude signal is superimposed on the 476 MHz as it is synchronized to the zero crossings of the 3 phase PG&E signal and to the damping ring revolution frequency. The fiducial is processed by the FIDO and goes to the PDU.
Fiducial Output
See FIDO.
FINUDA
Experiment conducted at the Frascati National Laboratories (Italy) phi-meson factory DAFNE
FLASH
Fluorescence in Air from SHowers. (SLAC-E-165)
Flemming
Beam Loading Feedbacks for the SLC damping rings, designed by Flemming Petersen.
FOLA
Friends of the Linear Accelerator (SLAC).
FRAB
ADONE beta anti beta group detector.
FRAC
FRACtional energy gain from the model. A magnet database secondary.
Fractional Energy Gain from the Model
See FRAC.
Fractional T1
A communication line consisting of some fraction of a standard T1 line. Fractions are allocated in multiples of 64 Kbps. A T1 line can support up to 24 64-Kbps channels.
FRAG
ADONE gamma gamma group detector.
FRAM
ADONE MEA group detector.
Fred
A SLC operation nickname for a PPS procedure allowing access into the SLC Arcs while the beam is still in the BSY.
FREJ
FREJUS Collaboration - modular flash chamber detector (calorimeter).
FRG
Federal Republic of Germany.
FSU
Former Soviet Union.

Back to top

G

GAC-SAC
General Advisory Committee - Science Advisory Committee. (1960s)
GADC
Gated Analog to Digital Converter. A circuit that selectively converts analog signals to a format readable by the computer. A SLC database primary.
Gargamelle
CERN Bubble Chamber commissioned in 1971.
GEM
Gamma, Electron, and Muon experiment. An SSC experiment which featured the `GEM' detector.
GENIUS
GErmanium in NItrogen Underground Setup. A proposal to use a ton or more of naked enriched germanium-76 detectors in a shielding of liquid nitrogen to probe neutrino mass.
GEONET
A program for alignment of SLC.
GGM (CERN)
GarGaMelle bubble chamber.
GIAT
Get-It-All-Together (SLC Group).
GKS
Graphic Kernal System. (Obsolete)
GM
General Motors.
GOCO
Government Owned, Contractor Operated (DOE).
GOLI
CERN GOLIath bubble chamber.
Gopher
A menu-based system for exploring Internet resources that pre-dates the World Wide Web. Requires a gopher server, which presents its contents as a hierarchically-structured list of files.
Greening
The action of trimming a phase, a feedback or a BACT to a nominal value or set-point. The new value as displayed by the VAX on its color monitors will be green (in tolerance) as opposed to red or yellow (out of tolerance).
Grinnel
A graphic video display system using the PICT imaging system. Used with the VAX to generate graphics. (The machine is made by Grinnel Systems Corporation).
GSG
Graphic Study Group (SCS).
GT-MHR
Gas Turbine -- Modular Helium Reactor.
GWP
Ground Warfare Panel.

Back to top

H

H1
DESY-HERA detector
HADES
High Acceptance Di-Electron Spectrometer
Handypak
Histogram and display package program. Computer graphics software formerly used at SLAC.
Hazardous Experimental Equipment Committee
See HEEC.
HBC
Hydrogen bubble chamber.
HDBC
Hydrogen and deuterium bubble chambers.
HEACC
High Energy Accelerator Conference.
HEBC
HElium Bubble Chamber.
HEEC
Hazardous Experimental Equipment Committee. An ad hoc committee which reviews and approves certain hazardous systems such as pressure vessels or large volumes of hazardous gases or cryogenic liquids for use by experimenters.
HEEP
High Energy Equipment Pool. A SLAC organizational group. Also High Energy Electronics Pool.
HEP
High Energy Physics. A major SPIRES database maintained jointly by the SLAC and DESY libraries which in 1999 contained > 390,000 references to preprints, journal articles, reports, theses, and conference papers. Used worldwide. Supserseded by InSPIRE-HEP.
HER
High Energy Ring for PEP-II, a 9 GeV storage ring for electrons.
HERA
See DESY HERA
HERMES
an experiment at DESY.
HESYRL
Hefei SYnchrotron Radiation Laboratory.
HLBC
Heavy-Liquid Bubble Chamber.
HOME
HOMEstake underground scintillation detector (South Dakota)
HOT
Sponsored by SLAC Computing Services, this meeting includes a review of scheduled power outages, a discussion of identified problems and outstanding issues, along with a brief recap of the Accelerator Operations daily meeting. The meeting is open to all laboratory staff.
HRS
PEP High-Resolution Spectrometer (SLAC).
HSTA
Hardware STAtus. A VAX database status bit indicating if a device is on-line or off-line.
HYBR
HYBRid: bubble chamber + electronics.
HYC
Hard Y Corrector.
Hypercard
A kind of programming environment that organizes all forms of information into what appear as stacks of index cards. The user then manipulates those stacks to create applications.

Back to top

I

I&C
Instrumentation and Control. Obsolete. See CD.
IAPCM
Institute of Applied Physics and Computational Mathematics
IDA
Institute for Defense Analysis.
IDIM
Isolated Digital Input Module. A CAMAC module with 32 individuals status input bits.
IDOM
Isolated Digital Output Module. A CAMAC module with 32 channels of opto-isolated output incorporating full control and read-back of output conditions.
IFB
Invitation For Bids.
IFC
International Finance Committee (BaBar).
IISS
International Institute for Strategic Studies.
IMB
Irvine-Michigan-Brookhaven underground Cherenkov detector experiment.
IMB-3
Irvine-Michigan-Brookhaven underground Cherenkov detector experiment.
IMRSS
International Monitored Retrievable Storage System.
INSPEC
INformation Services for the Physics and Engineering Communities.
IPL
Initial Program Load. A klystron CUD message indicating that the klystron PIOP needs to be IPLed.
IPL
Initial Program Load. On VAX system, it is used to re-boot or initialize a COW or other micro.
IRG
Institutional Reading Group (BaBar).
ISABELLE
Intersecting Storage Accelerator + BELLE (beauty): particle physics facility at Brookhaven National Laboratory approved for construction in 1978 but cancelled in 1983. (DOE)
ISG
International Study Group (NLC)
ISODARCO
International School On Disarmament And Research on COnflicts (Italian Pugwash Group).
ITCAP
International Technical Assistance and Cooperation.
ITDS
Information Technology Departmental Support group. (SLAC)

Back to top

J

JADE
JADE detector at DESY.
JAZELLE
A Data management system for SLD, based upon ZEBRA, a system first developed by CERN.

Back to top

K

KISNET
Keep It Simple NETwork. A SLAC SLC network.

Back to top

L

LAC
Liquid Argon Calorimeter. A SLD detector system. See also Calorimeter.
Landau Damping
Obsolete. See BNS Damping.
Laser-wire
A high-powered laser beam focused down to the smallest spot possible and used in the SLC to measure the size of the interaction point. The SLC laser-wire, commissioned in July, 1996,replaces conventional wire measures, which break apart from thermal shock at high beam intensities.
LASS
Large Aperture Superconducting Solenoid spectrometer at SLAC. A decommissioned ESB experiment.
LAVC
Local Area VAX Cluster.
LEACH
Local Electronics And Cryogenics Housing.
LEBC
Little European Bubble Chamber (CERN)
LEEP
Laboratory Electronics Equipment Pool.
LEM
Linac Energy Management. A VAX procedure used to adjust the LINAC quadrupole focusing strengths to match the changing beam energy profile. The beam energy varies as klystrons trip off, or their phases are changed.
LGPS
LarGe Power Supply. A database primary. Each LGPS is controlled by a CAMAC module (PSC).
LIB
LIBrary.
LIN
Abbreviation for Linac. PHYSICS
LINE
An Interactive Graphics Program.
LIRIC
Linac Improvement and Reliability Investigation Committee.
LITA
Library and Information Technology Association.
LMAC
LEP Machine Advisory Committee.
LRP
Long Range Plan (DOE).
LST
Limited Streamer Tubes. (BaBar)
LTDA
Long-Term Data Access. (BaBar)
LTR
Linac To Ring.

Back to top

M

M-2
Mark II Experiment.
M-3
Mark III Experiment.
MAC
MAgnetic Calorimeter detector at PEP/SLAC
MAC
Minority Affairs Committee.
MAC
CALF A Macintosh computer used as a terminal on the VAX control system. See also CALF.
macropackage
A collection of TeX macros, or definitions, that are used as a group to typeset documents following the guidelines of a specific page layout or style.
Magnetic Fusion Energy Network
See MFENET.
Main AG
The power supply, Main Alternating Gradient, that drives the 920 bend magnets of the SLC arcs.
MARK
Name given to several generations of both accelerators and detectors created and used at HEPL and at SLAC. (See http://www.slac.stanford.edu/history/mark.shtml.)
MARK I
A famous SLAC experimental detector, used to discover the PSI particle and the tau lepton at SPEAR in the mid 1970s.
MARK II
First used at SPEAR as a replacement for the MARK I detector, this SLAC experimental detector was then used in region 12 of PEP during the 1980's, and again used as the SLC primary detector until November of 1990. See also MARK I.
MARK III
An experimental detector used at SPEAR after Mark II.
Massimo Massimo Criteria are the orbit positions at the back end of each ARC, where the beams pass through the centers of the small- aperture fixed collimators at the entrance of the FF. The x and y orbit values are usually posted near COW 3 in MCC and in the FF SLC TODAY book. Named after Massimo Placidi, a CERN physicist who assisted in commissioning the SLC final focus. SLAC
MAT
An abbreviation for MATLAB used in VAX terminology for a type of mathematical problem solving file : ` File.Mat.'
MBCD
MultiBus CAMAC Driver. A Micro circuit card used to interface with CAMAC crates.
MCC
Main Control Center. The building (Bldg 005) from which the accelerator is operated. Also, the actual control room within that building.
MCD
Mechanical Component Design group (at SLAC)
MCR
Main Control Room.
MEL-FS
Multiprogram Energy Laboratory - Facilities Support.
MESSENGER
MErcury Surface, Space ENvironment, GEochemistry, and Ranging mission.
Mezzanine
The name of the Collider Hall second floor.
MIC
Monolithic Integrated Circuit.
MICE
Muon Ionization Cooling Experiment (RAL)
MICOM
A Switching box to manage broadband communications between terminals (via the servers) to the VAXes, the IBM 3270 and the Ethernet network. A terminal which is serviced by the `MICOMswitch' can be used on any of the SLAC site's main computers.
Micro Microcomputer. The SLC system includes about 70 microcomputers with 8086 or 80386 multitasking CPUs. Most micros are used to a) drive CAMAC crates which in turn control accelerator devices and instrumentation, b) perform standardization algorithms for magnets, and c) communicate with the VAX by either receiving instructions or returning information for monitoring and display purposes.
Microcomputer
See Micro.
Midas
See MidasWWW.
MidasWWW
The first fully-functional X-window GUI browser for the World Wide Web, written by Tony Johnson at SLAC. It features a multifont hypertext display, source code viewer, Motif Style Guide compatibility, and runs under UNIX and VMS. MidasWWW strongly influenced the subsequent development of the Mosaic and Netscape Navigator browsers.
MILAGRO
Gamma Ray observatory at Fenton Hill, New Mexico.
Mini Sam
Small Angle Monitor, used to detect Bhabha-scattered electrons in the Mark II detector.
MINOS
Main Injector Neutrino Oscillation Search (at Fermilab)
MINUIT
A FORTRAN numerical minimization program written by Fred James (CERN) in the 1970s.
Missing Pulse
See FIDO.
MK-II
MARK II Detector. The first SLC detector, replaced at the SLC by the SLD. See MARK II.
MKS MKSU Protect
A klystron summary display status indicating that the MKSU went into `protect mode.'
MKSU
Modulator Klystron Support Unit.
MKSU Protect
See MKS.
MKT MKSU Trigger Enable Fault
A klystron summary display indicating an interlock fault that causes inhibition of the modulator firing triggers.
MNT MaiNTenance
A klystron summary display message. In maintenance mode the klystron may be run locally. This is accomplished by triggering the unit at a time when there is no beam present.
MOAN
Modern Offline Analysis Nexus.(MARKIII)
MOD
MODulator. A klystron summary display message indicating a modulator interlock fault. Each klystron is powered by a modulator that produces accurately-timed high-voltage pulses of the proper width (3.5 micro sec), amplitude and polarity, to pulse the klystron tubes. Modulators can pass 4000 A peak current, and are triggered at multiples (and sub-multiples) of 60hz by the MTG. When we speak of `triggering a klystron,' we actually mean we are triggering its modulator.
MODEM
MOdulator-DEModulator. A device or program that enables a computer to transmit data over telephone lines.
MODulator
See MOD.
MORE
Microwave Oil Recovery Experiments.
MORSE
Multigroup Oak Ridge Stochastic Experiment.
Mosaic
A mouse-driven interface to the World Wide Web (WWW) developed by NCSA. (See also MidasWWW)
Mover
A stepping motor used to move a magnet with respect to the beam. The beam steering in the SLC arcs is done with magnet movers instead of the more conventional `trim winding' method.
MP00
Master Pattern generator zero. A microprocessor in MCC that generates the PPYY signals.
MRK1
See Mark-I
MRK2
See Mark-II
MRK3
See Mark-III
MRKJ
Mark-J detector at DESY
MTF
Memorandum-To-File.
MTG
Master Trigger Generator. Located in CID, this unit synchronizes the fiducial with respect to PG&E and the damping rings.
MTI
Multispectral Thermal Imager
Multibus
A backplane crate system similar to CAMAC or NIM designed to hold modules. SLC micros use a multibus system.
Multibus CAMAC Driver
See MBCD.
MURA
Midwestern University Research Association. Group working on high energy proton machine in the 1950's. Donald Kerst, Director, 1956 .
MUSASHI
Monoenergetic Ultra-Slow Antiproton Source for High-Precision Investigations, a group of the ASACUSA collaboration.
MUX
An abbreviation for Multiplexer.
MWC
Minority and Women's Committee.

Back to top

N

NA31
CERN NA31 Spectrometer-Calorimeter.
NAIAC
Nonproliferation, Arms Control and International Security Advisory Committee.
NAP
Non-proliferation Advisory Panel.
NBS
National Bureau of Standards (US).
NCA
North Collider Arc.
NDR
North Damping Ring.
Netscape
Netscape Communications Corporation, founded in 1994. Products included the popular Navigator Web browser, web servers, and tools for building intranets.
NFF
North Final Focus.
NFS
National Facilities Survey.
NIM
Nuclear Instrumentation Module. A backplane module crate system similar to the CAMAC system. The NIM system does not include a computer interface.
NIT
North Injection Tunnel. The electron transport line going from the BSY to PEP. Also: North Injection Transport.
NLC
Next Linear Collider.
NLTR
North Linac To Ring.
NN-20
DOE/NN Office of Research and Development
Nomad
A relational database in use at SLAC for numerous accounting and business applications. Nomad has the unique ability to transform a flat file into a searchable database without any restructuring of the file.
NOMAD
Neutrino Oscillation MAgnetic Detector (CERN)
Non-Production Web Pages
Pages and directories used to develop files which will eventually be launched into production. This is often your own ~username directory, but is may also be somewhere else in your personal space not linked to the SLAC home page. See also: Production Web Pages.
North Injection Tunnel
See NIT.
November Revolution
In physics, November 1974, when two separate experiments at SLAC and at Brookhaven independently discovered the first of a new set of particle states, the J/Psi particle. (See http://www.slac.stanford.edu/history/revolution.shtml.)
NPAC
Nuclear Program Advisory Committee.
NPI Nuclear Physics Injector
An electron gun in the LINAC, located at Sector 25, that delivers high current beams at low energy, which is not possible using the entire linac. It is also used to generate electrons for low-energy running when the front end of the LINAC is down for maintenance or for some other reason.
NPL
National Priorities List (from CERCLA)
NPO
Non-Purchase Order.
NRB
North Reverse Bend. See also RB.
NREX
North Ring Extraction. See also NREX loops.
NREX Loops
North Ring Extraction Feedback Loops (Circuits).
NRO
National Reconnaissance Office.
NRTL
North Ring to LINAC.
NSCY
A pair of numbers in the database. The first number represents the number of standardization cycles, and the second number represents the wait period before starting back down during a cycle in milliseconds (how long you wait at the top of the standardize).
NTM
National Technical Means
NUCHEP
Nippon-US Commission for HEP.

Back to top

O

OBLX
OBELIX detector at LEAR HEP
OC
Original Cataloging.
OCS
Office of Confinement Systems.
OER
Office of Energy Research.
OLYA
Detector at VEPP-2M and VEPP-4, Novosibirsk.
OMEG
CERN OMEGA spectrometer.
One-Shot
To one-shot refers to an SLC operator manually activating a feedback loop to make one attempt to automatically adjust to within its preset tolerances. This corrects for devices that slowly drift from their ideal settings, without risking the possible malfunctions that might arise if the computer made continuous or frequent adjustments without the operator's monitoring of the results.
OPAC
Online Public Access Catalog. The electronic descendant of the library card catalog, an OPAC contains bibliographic records and is interactively searchable. Access to an OPAC maybe limited to members of its generating institution's community, or may be open to a broader set of network users.
OPAL
OPAL detector at LEP.
OPCW
Organization for the Prevention of Chemical Weapons.
OSP
Office of Special Projects.
OSPK
Optical SParK chamber.
OST
Office of Science and Technology (1962-1973, functions transferred to NSF).

Back to top

P

PA
Public Affairs.
PAC
Physics Analysis Coordinator (BaBar).
PacMan
A concrete shielding structure at each end of the SLD detector between the endcaps and the pit walls. The two huge overlapping sections of each PacMan can be opened for access to the beam pipe.
PAD Phase and Amplitude Detector
An RF measurement module which has been designed to measure the phase difference between two RF inputs: the signal source and the reference source. The PAD data is fed into the database after several adjustments (linearization of pad error, MDL length, upstream sources). The reference signal is usually derived from the MDL on a local reference line called PRL.
PADO
Phase and Amplitude Detector Offset. The time at which the PAD samples.
PAO
Public Affairs Office
Paranoia
A VAX process that handles error messages from micros or from a SCP process that are destined either for a user or a SCP terminal. All error messages are written to the ERRLOG list which can be retrieved at any later time when investigating a fault or other action.
PAU
Pulsed Amplitude Unit. A CAMAC module used to control devices such as pulsed magnets and phase shifters which must change state at the accelerator pulse rate (up to 120 PPS).
PAWN
Producer-Archive Workflow Network (NARA)
PBC
Propane Bubble Chamber.
PBH
Pulsed Bend Horizontal. Refers to the dipole magnet used to switch electron bunches to the North Ring and positrons to the South Ring. Note that this magnet is no longer pulsed.
PCNL
President's Council on the National Laboratories.
PCR
PEP Control Room.
PD
Physics Discussion.
PD
Program Deputy. (MCC)
PDP-11
Programmed Data Processor. A Digital Equipment Corporation machine.
PDU
Programmable Delay Unit. A CAMAC module that contains in memory a beam matrix of 256 beam code possibilities contained in 16 channels and a desired time of output pulses for each of these channels. The PDU receives the beam code from the micro and the fiducial signal from the FIDO. In this way the two data paths (timing and beam codes) meet.
PDU Channel
One of the 16 channels of a PDU.
PE&D
Plant Engineering and Design.
PEG
Physical Electronics Group.
PEGASYS
PEp Gas tArget Spectrometer sYStem.
PEGGY
Polarized Electron Gun (with additional gy to make it affectionate ).
PEP
Positron Electron Project (originally the Positron Electron-Proton Project). A 2.2km circumference storage ring at SLAC with six interaction points, two SSRL beam lines, electron-positron storage and collision capability, 4 - 18 GeV energy range, and 50 mA currents. PEP was upgraded to be the site of the SLAC B Factory. See also PEP-II. SLAC
PEP II
See PEP-II.
PEP OIC
Operator-in-charge of PEP.
PEP2
PEP-II (Use for Spires).
PEP-II
Upgraded SLAC PEP electron-positron collider. Its transformation into an asymmetric B Factory included addition of a second storage ring, as well as new beam power and control systems.
PEP-II Database
The PEP-II Project-wide Oracle-based database. It is envisioned to encompass off-line data for machine configuration and administration, as well as much of the detector counterpart data.
PEPUP
PEP UPgrade.
Phase Bump
The `Phase Bump' is used to change the phase of the RF fill of an accelerator section. The general intent is to change the average phase of the RF seen by one beam, independent of that seen by the other beam. This is achieved by tweaking the phase (plus or minus) 90 degrees in the first or last 60 ns of the fill time. Currently, this method is used to adjust the energy spread of the scavenger beam.
Phase Decker
See Phase Bump.
Phase Jump
A Phase Shifter to compensate for the beam loading effect of the Damping ring RF cavities.
Phase Ramp
Damping Ring RF Facility for varying the phase so that the time of arrival of the extracted beam at the compressor and LI02 will be changed. Phase Ramp is moved in units of S-BAND degrees or 0.973 picosecond. Operators tweak Phase Ramp to adjust the beam spectrum and energy at the end of the LINAC, using X-ray screens in the BSY area.
Phasefix
A system for measuring and correcting the tune of the SLC arcs.
PI Mode
One of the two modes of bunch oscillation caused by the RF in the Damping Rings (the other one is called O MODE). In Pi mode the two bunches in a ring are opposite and oscillate toward each other (they are Pi radians, or 360 degrees out of phase with each other).
PIO
Public Information Officer.
PIOP
Programmable Input/Output Processor. A CAMAC module used for klystron control.
PIP
PEP Injector Project
Pipeline Mode
A PAU mode of operation in which a beam code signals the PAU to act on the following beam code. This mode of operation is often used in dealing with time slot separation problems.
PLO
PLant Office
PLS
Polarized Light Source. The SLC laser Gun.
PLUTO
Detector at the DORIS electron-positron collider (DESY).
PMAG
Pulsed MAGnets. A VAX database primary.
PMOG
Project Management Oversight Group. (Obsolete--See PMAG)
PNE
Peaceful Nuclear Explosions
PNet
Pattern Network Module.
PNPP
Particle-Nuclear Physics Pool.
POC
Publications Oversight Committee (American Physical Society).
Polarized Electron Gun
See PEG.
Polarized Light Source
See PLS.
Poll 0
A VAX process which checks all SLCNET micros for database status changes and errors. If a micro is not talking anymore, it is removed from the poll list and its poll becomes `0.'
POOP
Principles Of OPeration. An SLC control system document.
POPA
Panel on Public Affairs (APS).
Positron Electron Project
See PEP.
Pp Beam #
The higher byte of the PPYY is the PP beam code number used by the T-Matrix to define a certain beam. This number is generated by MP00 and broadcast to all micros.
PPC
PEP Policy Committee. (Obsolete)
PPF
Preprints in Particles and Fields. A weekly list of new preprints received in the SLAC Library and entered in the HEP database. Once available on the web athttp://www.slac.stanford.edu/library/documents/newppf.html. See also 'Anti-Preprints.' Ceased publication in 1993
PPOM
Pulsed Power Output Module. A CAMAC module.
PPYY
A 16 bit word used by timing software and hardware to select times at which devices should be triggered on an upcoming machine pulse. It is generated at MP00 and broadcast at 360hz on the SLCNET to the various devices. It is received by the CAR in Crate 1 of a typical sector micro. PP is the high order eight bits or `beam code' used to select the time delays for devices such as klystrons and kicker magnets. YY is the low order eight bits, used to synchronize additional devices such as BPMs.
PRAW
Phase RAW. A database secondary. It is the raw phase measured by the PAD.
Preprints in Particles and Fields
See PPF.
PRIF
Peace Research Institute Frankfurt
PRIM
Pattern Receiver Interrupt Multiplexer. A multibus module which receives PPYYs from the CAR and interrupts the micro CPU.
PRIM-9
Interactive computer graphics program for Picturing, Rotation, Isolation, and Masking in up to 9 dimensions. Developed at SLAC in the 1970's.
Primary
A class of signal names in the VAX SLC database.
Principles of Operation
See POOP.
PROD
Photon Research and Operations Division.
Production SLAC Web space
Holds all the SLAC Web pages and associated files connected to the SLAC Core Pages except Individual Home Pages. Files in the Production Space are made available to the Web by authorized SLAC WWW server that use the standard port (now 80), for example, files in /afs/slac/www served by the www host.
Production Web Pages
Pages and directories that are linked directly or indirectly from the SLAC Home Page. Production pages are meant to be viewed (i.e., they are in production) by any intended audiences, including people outside of SLAC. See also: Non-Production Web Pages.
PROF
PROFile Monitor. A VAX primary.
Programmable Delay Unit
See PDU.
Project M
The Stanford University project, developed by interested parties in the Hansen Laboratories and Physics Department, for the construction of a 2-mile, multi-BeV linear electron accelerator. Called Project M from 1956 - 1960, the project was renamed Stanford Linear Accelerator Center in 1960. The M stood for Multi-Gev and/or for Monster.
Proton-Electron Project
See PEP.
PS
Photon Science (Directorate-SLAC).
PSAC
Presidential Science Advisory Committee (US)
PSC
Power Supply Controller. A single width CAMAC module used to control large power supplies. The PSC contains both a DAC and/or an ADC plus control and status bits.
PSIS
Photon Science Integration Study. (SLAC)
PSOG
Power Supply Operations Group. Obsolete: was part of EFD.
PSU
Programmable Synchronization Unit. Provides timing for delays longer than the fiducial period, which is about 2.8 milliseconds, or provides multiple pulses per fiducial. Used to synchronize devices to the damping ring beams. The PSU delay, period and pulse width are programmable.
PTT
Post Telephone and Telegraph Administration. A generic term for government-operated common carriers in countries other than the U.S.A. and Canada. Examples of the PTT are British Telecom in the United Kingdom, the Bundespost in Germany, and the Nippon Telephone and Telegraph Public Corporation in Japan.
Public Disk
A Macintosh in the computer center used as a file server for the MAC network.
PVSO
Pressure Vessel Safety Officer. (SLAC)
PWU
Programmable Width Unit. A CAMAC module used for gated pulses such as gun triggers. Triggers are received from the backplane and outputs are pulsed with programmed duration.

Back to top

Q

QSPIRES
A web server which is used to remotely query various SPIRES databases (HEP, BOOKS, CONF, INST, etc.). The QSPIRES query is used to locate e-mail addresses for physicists worldwide. QSPIRES is available via the Internet at qspires@slac.stanford.edu.

Back to top

R

RA1 - RA6
Rate (0 through 120) on time slots 1 through 6.
RAB
Receiver ABort.
RADCON
Radiological Control manual.
RAMM
Remote AMplifier Monitor. A SLC VAX primary.
RB
Reverse Bend. The section near the upstream end of each SLC arc where the curvature changes direction so that the beams can be steered around toward the IP.
RCBC
Rapid-Cycling Bubble Chamber. HEP
RD
Research Division. A SLAC organizational group.
RE
Klystron Reflected Energy. A klystron summary display message indicating problems with reflected energy. See also RP.
RED
Research Electronics Division. (SLAC)
RESA
Research Equipment Storage and Assembly.
Rhumbatron
Cavity resonator invented by Hansen to serve as a powerful electron accelerator with relatively modest power consumption. As a particle accelerator, it was surpassed by the Kerst betatron, but it became a crucial part of Stanford's first microwave tube: Varian's klystron.
RIPL
The ripple readback from the SAM module.
RND
Reducing Nuclear Danger.
Rollfix
A system for compensating for the rolls in the SLC arcs.
ROSAT
ROentgen SATellite. An X-ray observatory developed through a cooperative program between Germany, the US and the UK. Launched June 1 1990 and turned off February 12, 1999.
RPC
Resistive Plate Chamber. (BaBar)
RPC
modules Resistive Plate Counter modules for detecting muons and long-lived kaons in the Belle detector (KEKB)
RTL
Ring To LINAC. A transport line section that brings the beam from either damping ring back to the LINAC.
Rx
Tone Receiver. See Tone Loop.

Back to top

S

S/C
Sub Contract.
SAAC
Scientific and Academic Advisory Committee.
SABER
South Arc Beam Experimental Region.
SAC
Science Advisory Committee.
SAD
SLAC Advanced Design Committee (ca. 1968)
SAIC
Science Applications International Corporation.
SAMMI
SLC Automatic Magnet Measuring Instrument.
SAMPLE
an experiment at MIT-Bates, measuring backward-angle electron scattering from hydrogen and deuterium targets.
SAN
Department of Energy San Francisco Operations Office.
S-BAND Feedback
A feedback system to lock the beam extraction time from Damping Ring to an S-BAND (LINAC RF) reference.
SBIR
Small Business Innovation Research
SBSS
Science Based Stockpile Stewardship
SCA
SuperConducting Acceleration. Also, SuperConducting Accelerator (Stanford University).
SCC
Serial Crate Controller. A camac module driving an individual crate and used to interface between the serial link multibus and the CAMAC modules in that crate.
SCIP
Stanford Center for Information Processing.
SCP
SLC Control Program (Pronounced SKIP). The process running the COWs and other consoles when they are controlling the SLC machine. Each console can be operated under its own SCP program.
SDC
Solenoidal Detector Collaboration (SSC)
SDI
Strategic Defense Initiative.
SDR
South Damping Ring.
SDS
Status Display Summary. An MCC display that shows the operational status of various SLC devices.
SEAB
Secretary of Energy Advisory Board (DOE).
Secondary
A class of subsignal names in the VAX SLC database. Each primary signal can have up to 255 secondaries or subsignals.
SEP
SSRL Enhancement Project
SERC
Science and Engineering Research Council.
SETL
A magnet parameter indicating the settling time for a power supply to stabilize after a change. A SLC VAX secondary.
SFT
Super Fixed Target beauty Facility. Competing with other B factory ideas, SFT proposed using a 20Tev proton beam to measure CP violation at the SSC Laboratory. The SFT proposal was turned down in review.
SHAP
Supplemental Housing Allowance Program.
SHB
SubHarmonic Buncher. The bunching system after the CID gun that groups the electrons into the two bunches needed by SLC. The two SHB (178.5 MHz) are subharmonics (1/16 of S-Band) of the LINAC RF frequency. It incorporates the following: A) A magnetic mirror to protect the gun, B) Ten solenoids to maintain the beam through the pipe and inhibit the spiraling of the electrons, C) two subharmonic bunchers in which the bunching is accomplished through velocity modulation using a standing wave resonator and two cavities.
SHF
SLAC Hybrid Facility photon collaboration.
SII
SLAC Improvement Initiative.
Simple Timing Buffer
See STB.
SIP
Summary Information Process. A database primary.
SIPRI
Stockholm international Peace Research Institute.
SISE
Summer Internships in Science and Engineering. See ERULFs.
SITN
Stanford Instructional Television Network. Operated through the Stanford Center for Professional Development (SCPD). SCPD broadcasted over 250 Stanford courses a year.
SLAC-LBL detector
Original name of the Mark I detector. One of the first large solid angle detectors. Built by SLAC Group E (Martin Perl and Gary Feldman), Group C, and a Lawrence Berkeley Lab group led by Willy Chinowsky, Gerson Goldhaber, and George Trilling. Detector was later expanded to improve muon detection and then modified to improve the electron and photon detection.
SLAM
SLC LAM Generator. A CAMAC module.
SLC
Stanford Linear Collider (100 GeV Ecm). Originally SLAC Linear Collider.
SLC Control Program
See SCP.
SLC Large Detector
See SLD.
SLCCS
SLC Control System. Software system designed in the early 1980's for accelerator control.
SLCNET
The broadband local area digital network that communicates between the VAX and the micros located in the various SLC areas. This is a custom high speed logic star network using MULTIBUS.
SLD
SLAC Large Detector. A particle physics detector optimized for the SLC interaction point. SLD has also been called the Stanford Large Detector and the SLC Large Detector. Sources close to the experiment confide that SLD was originally called the Slick Little Detector.
SLD-Notes
Publication produced by the SLD Collaboration on an irregular basis.
SLEAP
Stanford Linear Electron Accelerator Project. (1960's name for what eventually became SLAC. Came after Project M name.)
SMC
Stepper Motor Controller. A CAMAC module.
SMP
Strategic Military Panel
SMPS
SMall Power Supply. A SLC VAX primary.
SNOOP
Diagnostic module for Fastbus.
SOB
StandOff Box. (BaBar)
SOPF
Stanford Outdoor Primate Facility
South Injection Tunnel
See SIT.
SPASM
Single-Pass ASseMbler.
SPC
Single Pass Collider.
SPCP
Single Pass Collider Project (Proposed in 1980).
SPI
Sign of Polarization Inverter, a SLC Polarized Light Source Subsystem.
SPIRES
Stanford Public Information REtrieval System. A database management system widely used for large bibliographic databases. At SLAC, BINLIST, HEP, BOOKS, DRAW, CONF, SEMINARS, SERIALS, and INST are some of the databases maintained in SPIRES.
SPRK
Spark chamber.
SRC
Science Research Council.
SSC
Superconducting Super Collider (defunct).
SSC Advisory Panel
See SSCAP.
SSCAP
The SSC Advisory Panel. An international committee of physicists that determined the SSC experimental program.
SSP
Science Simulation Plan
Stanford Public Information Retrieval System
See SPIRES.
STANFORD-PRINCETON STORAGE RINGS
A figure-eight, weak-focusing, electron-electron collider built at Stanford in 1958-1963 by a group led by Gerald K. O'Neill (Princeton) and Burton Richter (Stanford). Using the Stanford MARK III accelerator as an injector, the collider consisted of two rings, each ten feet in diameter, in which electrons circulated in opposite directions, colliding at the intersection point. When built, the rings contained the largest ultra-high vacuum system in the world. The energy lost to synchrotron radiation was compensated for by a radio frequency system which gave an electron a boost of energy as it came through the accelerating cavity. The detector used on the rings was an optical spark chamber.
STEP
A SLC VAX primary which includes stepping motor status and other devices using such motors.
STRC
STReamer Chamber.
Summary Information Process
See SIP.
SUP
Seismic UPgrade.
SuperB
A high-intensity B-factory planned for construction near Frascati in Italy
Supersloop
Working name for 1970's project to convert the SLAC linac to a superconducting accelerator. (Project was canceled)
SUPF
Stanford University Primate Facility (former SLAC neighbor).
System 20 Box
A local network server used by the VAX computers to communicate with their terminals. System 20 uses one frequency band of the CATV network. The box is made by SYTEK.

Back to top

T

TBD
To Be Done.
TBLC
Two-Beam Linear Collider
TCM
Toroid Charge Monitor. A CAMAC module used to digitize beam current intensities measured by the toroids in the beam line.
TD
Technical Division.
TDC
Time to Digital Converter. A database primary.
TDL
Technical Data Library. Branch of SLAC Library devoted to specifications, standards, and vendor catalogs. Discontinued in 1993.
Technical Data Library
See TDL.
TEXAS
Totally hermetic EXperiment At the Supercollider (SSC).
Text Processing Unit
See TPU.
Tick
The finest timing increment in the SLC timing system. 1 tick = 8.4 nanoseconds (119 MHz).
Time Matrix
See T-Matrix.
Time Nominal
See TNOM.
Time Projection Chamber
See TPC.
TIS
Technical Information Services Department.
T-Matrix
A VAX database which contains most of the timing data necessary to run all the triggerable devices in the machine. Each micro contains the piece of the T-Matrix it needs, called the beam matrix. `IPLing' the micro refreshes or reloads the T-Matrix into the micro.
TMUX
Trigger MUltipleXer. A CAMAC module which sends a pulse to the GAP Voltage controller module.
TNOM
Time NOMinal. A T-Matrix or beam matrix time delay relative to the reference beam. Can be programmed to give a single value offset to all triggered devices in a micro for any given beam code. Done only with BDL.
TNRLC
Texas National Research Laboratory Commission.
TOPS
TOp hat Pulse Shaper, a SLC Polarized Light Source Subsystem.
TOPS
Technology Opportunities for increasing the Proliferation resistance of global civilian nuclear Power Systems
TPAP
Transcontinental Persistent Archive Platform.
TPC
Time Projection Chamber. A two gamma detector formerly located at PEP Region 2. Also, a detector for the ILC under development at DESY, and a detector for the LZ experiment.
TPU
Text Processing Unit. A DEC utility to handle file editing programs on the VAX. TPU is used to create MACROs for the EVE editor.
Transiac
A brand name. It usually refers to the 16 channel DAC CAMAC module used throughout the SLC.
TT
Tiger Team. GOV
TTBT
Threshold Test Ban Treaty
TWA
Treatment Works Approval.
TWIXT
Region upstream of a dipole between the two magnets.(On LASS, twixt was downstream of the solenoid and upstream of the dipole.)
TWR
Transient Waveform Recorder. A CAMAC module.

Back to top

U

UG
Unified Graphics. (Obsolete)
Unibus
A bus system developed by DEC for the PDPs and other DEC computers.
USPCI
U. S. Pollution Control, Inc.

Back to top

V

Valiant Little Terminal
See VLT.
VAX
Virtual Access computer made by Digital Equipment Corporation.
VAX CAMAC Channel
See VCC.
VAX SLCNET Channel
See VSC.
VBA
Very Big Accelerator.
VCAM
Video Cable Access Module. A CAMAC module which can be programmed to multiplex any one out of eight video signals from cameras and to transfer that signal to one of five possible CATV channels. It multiplexes the video signals used by the operators at MCC.
VCC
VAX CAMAC Channel. A chassis which interfaces the VAX unibus DMA system to the CAMAC system.
VCO
A chassis used to vary the damping ring frequency.
VDCI
Video Digitizer Clock Interface. A CAMAC module.
VDS
Vertex Detector System. (Mark II) HEP
VDST
Video Distribution SysTem. A VAX primary.
VDT
Video Display Terminal.
Video Cable Access Module
See VCAM.
Virtual Machine
See VM.
Virtual Machine/Conversational Monitor System
See VM/CMS.
VM
Virtual Machine. Refers to the operating system on the IBM 3081 or 3270. (Phased out at SLAC in 1997.)
VM/CMS
Virtual Machine/Conversational Monitor System. IBM main interactive timesharing system.
VMS
Virtual Memory System. DEC's designation for the VAX operating system. COMPUTING
VSC
VAX SLCNET Channel. Refers usually to the interface circuit and firmware (the VSC box) between the VAX and the SLCNET.
VVC
Virtual Visitors Center

Back to top

W

WDC
Washington, DC GOV
WIC
Warm Iron Calorimeter. A part of the SLD detector.
Wirefix
A System for making harmonic corrections in the SLC arcs.
WIS
Women's Interchange at SLAC.
WISRD
Wire Imaging Synchrotron Radiation Detector. Part of the system that measured beam energies at the SLC.
WSC
Web Support Coordinator
WWWCC
WWW Coordinating Committee (SLAC)
Www-tech
World Wide Web Technical Committee (SLAC).
WYLBUR
A text editing program for the VAX. It was a component of SLAC's mainframe system before VM, the IBM 360 OS/VS.

Back to top

X

XEBC
Xenon bubble chamber.
X-Ray Screen
A profile monitor off the beam path where x-rays created by a synchrotron radiation source hit some material to generate secondary emission of visible light. The light itself is recorded by a video camera and transmitted by cable to MCC. This type of beam monitor is used extensively in storage rings where anything placed in the beam path would kill the stored beam.
Xyplex
One of the two local network servers to communicate between the VAXes and the terminals.Xyplex is a brand name for this connection box.

Back to top

Y

Back to top

Z

Z Location
Any SLC device has a Z location in meters (longitudinal distance from some reference point). The reference point for the SLC system is at the beginning of sector 1 (CID has negative numbers). For example, QUAD 111 (the first magnet in sector 1) has a Z position of 0.8000000 meters).
Z Per Hour
See ZPH.
ZEUS
an experiment conducted using the HERA collider.
ZFS
Originally, Zettabyte File System. A Solaris file system that manages physical storage with storage pools.
ZGS
Zero Gradient Synchrotron (Argonne).
ZPH
Z Per Hour. A measurement of SLC luminosity, or Z production rate.
ZTIM
Indicates the last time a magnet standardization was lost. A database secondary.

Back to top

| Archives, History & Records Office |